Package org.apache.hadoop.hdfs.server.balancer

Interface Matcher

public interface Matcher
A matcher interface for matching nodes.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final Matcher
    ANY_OTHER
    Match any datanode with any other datanode.
    static final Matcher
    SAME_NODE_GROUP
    Match datanodes in the same node group.
    static final Matcher
    SAME_RACK
    Match datanodes in the same rack.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    match(org.apache.hadoop.net.NetworkTopology cluster, org.apache.hadoop.net.Node left, org.apache.hadoop.net.Node right)
    Given the cluster topology, does the left node match the right node?

  • Field Details

    • SAME_NODE_GROUP

      static final Matcher SAME_NODE_GROUP
      Match datanodes in the same node group.

    • SAME_RACK

      static final Matcher SAME_RACK
      Match datanodes in the same rack.

    • ANY_OTHER

      static final Matcher ANY_OTHER
      Match any datanode with any other datanode.

  • Method Details

    • match

      boolean match(org.apache.hadoop.net.NetworkTopology cluster, org.apache.hadoop.net.Node left, org.apache.hadoop.net.Node right)
      Given the cluster topology, does the left node match the right node?